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T. H. SLOAN GLASS FORMING MACHINE Filed Oct. 12, 1926 l Sheets-Sheet 1sW TNES 5 E Patented Oct. 30, 1928. I

. UNITED STATES THEODORE H. SLOAN, OF CHARLEROI, PENNSYLVANIA, ASSIGNORTO MACBETH-EVANS GLASS COMPANY, OF PITTSBURGH, PENNSYLVANIA, ACORPORATION SYLVAN'IA.

OF PENN- GLASS-IORMING MACHINE.

The invention relates to glass forming m'a-- chines of thetype in whichglassfrom a source of supply is mechanically delivered to forming unitswhich are operated in coordination with the glass delivery mechanism. Inother words, it relates to full automatic glassforming machines. In itsbroader as pects, it is applicable to various species of glass formingmachines, including press and blow machines and blowing machines ofeither the iron or paste-mold type. However, the invention isparticularly applicable to paste-mold machines for the manufacture ofelectric lamp bulbs, lamp chimneys, tumblers, and other paste-moldarticles, and it is such a machine that is herein illustratedand-specifically described.

An object of the invention is to improve the mechanism for receivingglass from coordinated glass delivery apparatus, and for delivering thereceived glass to forming units of a machine.

A further object is to so simplify and otherwise improve theconstruction and oper- 7 ation of forming and blowing units of blowingmachines, particularly paste-mold-macliines, and to so improve theconstruction and operation of the machine as a whole, that blown glassarticles, and particularly paste- 3 mold articles, may be moreeconomically manufactured.

The invention is illustrated in the accom panying drawings, of whichFig. 1 is an elevation of a glass forming machine and a feeder, portionsof the feeder being shown in vertical section to illustrate itsconstruction; Fig. 2 a plan view of the machine; Fig. 3 a horizontalsectional view taken on the line IIIIII. Fig. 1," showing drivingconnections; Fig. 4 an elevation to enlarged'scale of a portion of theside of the machine; Fig] 5 a vertical sectional view taken on the lineV-V. Fig. 4:. showing the outer portion of the machine between formingunits; Fig. 6 a' vertical sectional view taken on the line VI -VI, Fig.4, showing half of the machine at the position of a forming unit; Fig. 7a vertical sectional view corresponding to the upper left hand portionof Fig. 6, the view being to enlarged'scale and showing a receiving cupin the position opposite from that shown in Fig. 6, andalso showing insection mechanism for operating a blowing head; Fig. 8 a sectional viewto enlarged scale taken Application filed October 12, 1926. Serial No.141,097.

on the line VIII-VIII, Fig. 6, showingreceiving cup locking mechanlsm;Figs. 9 and 10 vertical sectional views taken, respective ly, on thelines IXIX and X X, Fig. 8, showing the construction of the receivingcup mechanism; Fig. 11 an elevation of the receiving cup mechanism shownin Fig. 10; Fig. 12 a vertical sectional view taken on the line XIIXII.Fig. 8; Fig. 13 a diagrammatic View of the preferred arrangement ofseveral cams on the turret and frame for operating the receiving cupmechanism shown particularly in Figs. 8-12; Fig. 14 a vertical centralsectional view of a blowing head when turned upwardly with its severalparts in the positions which the occupy when a blank is molded on thehea Fig. 15 a .view similar to Fig. 14, showing the parts of a blowinghead in the positions which they occupy during a pufling operation;'Fig. 16 a view similar to Fig. 14 with the blowing head turneddownwardly and its parts in the positions which they occupy during thefinal blowing operation; Fig. '17 a viewisimilar to Fig. 16 showing theparts of the blowing head in the positions which they occupy when thechuck has been open to release a' blown blank; Fig. 7

18 a sectional view taken on the line XVIIIXVIII, Fig. 16, showing aninterference lever for controlling the pufling and blowing mechanism ofthe blowing head; Fig. 19 a transverse sectional viewofthe lever takenon the line XIX-XIX, Fig. 18;

Figs. 20 and 21 horizontal sectional views of a combined suction and aircontrolling valve at the center of the machine, the planes of View beingindicated,-respectively, by the.lines and XXI XXI,' Fig. 6; Figs. 22, 23and 24 verticalsectional views taken,

respectively, on the lines XXII-XXII,

XXIII-XXIII, and XXIV- XXIV, Fig.

.7, showing driving and operating connections for a blowing head; Fig.25 a horizontal sectional view taken on the line XXVXXV, Fig. 7, showingdriving and operating connections for a blowing 1,689,915 PATENT OFFICE.

head; Figs. 26 and 27 horizontal sectional views taken, respectively, onthe lines XXVIXXVI, XXVIIXXVII, Fig. .7, showing mold mechanism; Fig. 28a vertical sectional view of a mold, the plane of view being indicatedby the line XXVIII,XXVIII, Fig. 26; Fig. 29 a horizontal sectional viewto enlarged scale taken on the line XXIXXXIX Fi 4, showing a shot boltoperating cam for tie receiving cups, and showing connections from thecam to the bolt; Fig. 30 a horizontal sectional view taken on the lineXXX-XXX, Fig. 4, showing a mold operating cam and connections from it;Fig. 31 a diagrammatic View of the principal units of the machineshowing the several positions they occupy in a complete cycle of themachine and Fig. 32 a diagram showing the timing of most of theoperating elements of the machine when adjusted for manufacturing agiven article.

The machine provided according to this invention includes a frame which,among other things, supports a continuously rotatable turret providedwith a plurality of equally spaced glass-forming units which movecontinuously with the turret. These units may, as far as concerns somefeatures of the invention, be of various types for blowing glassarticles in iron, or paste-molds, but as far as concerns other featuresof the invention they are for forming glass by the paste-mold process.The forming machine is coordinated with aglass feeder which may be ofany desired type, but which is prefcr ably a gob feeder of theneedle-shear type. The continuously rotating turret is provided with aplurality of cups for receiving glass from the glass-delivery apparatus,each cup being adapted to normally more with the turret in registrationwith the one of its forming units. Provision is made for holding each ofthe cups in succession stationary at thedeljyery station for receivingglass and for subsequently causing it to move with the turret inregistration with one of the .forming units which succeeds or followsthat with which the receiving cup was previously in registration.Preferably the receiving cups are arranged above the forming units, andwhen so arranged, the machine includes provision for turning each cupdownwardly to deliver its received glass to a formin unit, suction meansbeing providedto hol d the glass in the cup until it is delivered to theforming unit. Whenthe forming units are of the paste-mold-t pe, thereceiving cups are also parison mol s, and provision is made for movingthem towards the blowing heads of forming units to mold parisons onthem.

In the preferred embodiment of the invention each forming unit includesa blowing head and a cooperating blow mold, and the blowing head ismounted for rotation on a 7 horizontal axis toplace the glass in itsoooperating blow mold. To prepare a pastemold blank from a parisonmolded'upon the upperend of a blowin head, provision is made forrotating the blowing headon its longitudinal axis and for putting ablank at such intervals as may be required to properly prepare it forblowing.

Referring now to the illustrative embodi' ment of the machine, theentire structure, except the glass delivery mechanism, is borne by aframe including a base 1 (Fig. 6) a central drum or inner frame 2 and anouter frame 3 borne by standards 1 attached to base 1. Surrounding drum2 there is a turret 5 which, among other things, carries glassformingunits for continuous movement with it, each of which may, as previouslystated, include a blowing head 6 and a blow mold 7. For continuouslyrotating the turret, its lower end is provided with a worm wheel 8 whichmeshes with a worm 9 attached to a shaft 10 (Figs. 3 and 6) adapted tobe driven in the manner presently to be explained. At

the top of turret 5 between the blowing units there are posts '11 (Fig.5) which support a guide frame 12 forming part of the turret, whichframe is provided with a plurality of receiving .cups 13 movable withand with re lation to the turret.

The base 1 of the machine may be provided with truck wheels 14 (Fig. 1)adapted to ride upon rails 15, so that the machine may be moved to andfrom a source of glass sup ply, as for example a fore-hearth 16 of aglass melting tank. Glass is preferably delivered from the fore-hearthto receiving cups 13 by means of a vertically reciprocable needle 17adapted to control flow through an orifice 18 in the bottom of thefore-hearth, the needle being so reciprocated that gobs of glass ofpredetermined uniform size are intermittently discharged. These gobs areintermittently cut from the source of supply by shears 19, which areoperated in coordination with the reciprocation of the needle in anydesired mannerwell known in the art.

The feeder, rather conventionally illustrated in Fig. 1, includes avertically reciprocating shaft 20 to the upper end of which needle 17 isindirectly attached. To coordinate the operation of the forming machinewith that of the feeder, a single motor 21 is provided for operatingthe' feeder and for driving shaft 10 which rotates turret 5. As shown inFig. 1, this motor drives a shaft 22 which is suitably geared to arotatable shaft 23 forming part of the feeder and to turret drivingshaft 10. The connections for driving shaft 23 include a worm 24 and aworm wheel 25 attached to such shaft, and the connections for drivingshaft 10 include pinions 27 and 28, a shaft 29, pinions 30 and 31, a

shaft 33 and pinions34= and 34, (Fig. 3)

the latter of which is att-ached toshaft 10.

